Question

What is the percent change from 72 to 90

Answer 1

From 72 to 90 it is a 25% change

Answer 2

To find percentage increase, you first work the difference between the two. 
90-72=18.
Then you look at whether it is a percent increase or decrease. From 72-90 is an increase. Then divide the increase by the original number. 
18/72=.25
Then multiply by 100. 
.25*100=25
Add a percent sign: 25%
~Hope this helps!